Universal curve device



rio

Patented Nov. 6,` 1928.

`P`AprENT* oFFicEQ) i' NORMAN n.A KLEIN, Aor MEDFORD; aaneen. e

' unrvnnsnn CURVE nnvionf` Application fried otober 21, 1927. semi No. 227,754.

My present invention hasto 'do with devices for :facilitating drawing, and moreparticularly the drawing/of curves; and it has for its object theprovision' oa device 'for the `use of a draftsman, calculated to enable the draftsmanv to accurately draw curves that approach a straightv line as distinguished from sharp bendsor arcs tot1 short radii.

My novel device is usel'ul in that it is susc-eptible of being readily adjusted and adjustably iixed for the guidance of a draftsman in making various curvesv oit the lrind indicated.V f

To the attainment of'tliefiforegoing the invention consists inlthe improvement as here#A inaiter described and definitely claimed.

In the accompanyingdrawings forming part of'this specification: y Figure 1 is ya plan `vie'wolthcnniversal curve device constituting the preferred enibodiment of my invention. 1

Figure 2 is a view of ythe device vitalrenat right angles to Figure 1 and showing some of the parts in section Figure 3 is a cross-section on line 3-? of Figure 1. f

Figure 4- is a crosssection on line i-'4 of Figure 1.

Similar .numerals of reference designate corresponding parts in all views of the drawings. l

Jamong other elements,` my novel kdevice l comprises an appropriate frame 1 and abendable element 2. The element 2 is oil? steel and possessed of resiliency and is Vof uni-form cross section throughout its length, and consequently the said element 2 is capable of being bent smoothly in proportionto the force applied, and this Without the element having small checks or deviations such as occur in;

corresponding elements of lead or rubber.

In engineering Work curves to be plotted ot' the kindthat approach a straight line, as distinguished from sharp bends or arcs of short radii are frequently encountered, and for this class of Work my novel instrument characterized by a resilient steel or other ap` propriate resilient element is particularly adapted. v v Y y In addition to the frame 14 and the element '2, my novel device or instrument comprises means at 3 to hold the element 2 against end- Wise movement. The said means V3 is at one end of the frame 1, and at the other end of the frame is provided means generally designated bye' for applying angular bending stresses to the element 2.- L

Manifestly by the means indicatedthe eleV ment y2 may be given agreat nun'iber oi. positions and curves, the lmeans B being loosened andthe means l` beling'adjusted rior the desired positioning of the elements 2and vthe means '3 being: then tightened whereupon the device or instrument maybe made ready for As will' be readily understoodjvarious curves may be producedinf the manner de scribed. Ixvvould have it .understood,ho\vs ever, thatV if 'a curve suchiasrillustrated by dotted lines inF-igure 1y and designated by'is desired, the element 2 is first adjusted to v4the dotted line position in the manner "described and the-n the means Il is manipulatedvso as to tend to bend the element v2 by turning'iof the sleeve G. i

Aszivill be understood from thedraivings,

the fineans of my improvement preferably comprisesa sleeve 6 ]ournaled1in the framefl `and i having` diametrically allned apertures 8 "on one sideofthe frame 1 and a flange k9 at the opposite side of said frame 1, a. threaded pin 10 disposed in the sleeve 7 and having a diametrieal aperture 11 adjusted to be ar- -ranged in alinement with the aperture 8 to receive the element 2, and aV lock nut 12 lmounted on the threaded portion ofthe pin 10. It will he readily understood that when the nut 12 is loosened, the element 2 may Vbe readily adjusted endivise through the alined apertures 8 and 11, While when the nut r12 is tightened, the element 2 will be forced against the frame 1 and strongly held With respect to said frame 1.

portion 14 of theframe 1 and arranged at Y one side thereof is a housing 17x in which is disposed a Wormgear 18 fixed to the sleeve y16 so astoturn therewith. vA threaded piny 19 is arranged in the sleeve 16 and has an aperture 2O which When alined with the aperv tures 17 is adapted to receive the element 2. The means 4 alsoincludes a nut 21 mounted on the pin"19 and adapted to `be set against one end of the sleeve 16, astub housing 22 xed with respectl to and communicating The arm 1 of the frame lis oiset at 13 and i I with the interior of the'housing'l* and a the element 2 will. be bent.'`

l Manifestly my novel deviceor instrument is susceptible of being expeditiously yand easily adjusted to impart to the element 2 the curve or configuration desired, and I Would ralso have it understood that my novel device'r vtersr Patent is is adapted to'be arrangedflat on a. drawing board and used in oonvenient'manner in the drawing of` curves. f p

(Having thus described the invention, what I claim as new andfdesire to 'secure by Letrl. Adevice or-instrument for the purpose described,V comprising a frame, a resilient fbendable element, means on the frame for `Vholding said element at'one rend thereof againstr lengthwise movement, and' element bending means vcarried by the framer and inv cluding a' Worm gear, turnable in the direction of 'the length of said element, means forffastening' the bendable element toA the Worm gear, and disposed to cause arching ofv the bendable elements on turning of the Worm gear and a Worm meshed with said Worm gea-r and-adapted to adjust and hold the lat- Y ter against casuall rotation. y

2. Adevice or instrument for t-he purpose described, comprising a frame, a resilient bendableelement of uniform cross section throughout its length,k adjustable means on vthe framefor holding` said element against lengthwise movement, andr element bending y means carried by the frameand vincluding a Worm gear, `means for fasteningy the; bendable element to the Worm -geaigjand a Worm ,meshed with said Worm gear and yadapted to adjust andhold the latter against casual rotation; ther said adjustable means including' akflanged and apertured ksleeve inv the f frame, ,a threaded and apertured pin in the sleeve, and a nut on said pin'.

A devicefor instrument for the purpose f described, comprisingla frame,1 a resilient bendable element of uniform Crossseotion throughout its length, adjustable meanson the frame for holding `rsaid elementagainst lengthwise movement,- andl element` bending means carried by the'frame-and includingv ar ,Worm gear, means foi fastening thev bendable element to therivorm i' gearfhousing Vmeans* ontlie frame,and a -Worm meshedwith said Worm 'gear land, disposed in said housing f means.

" vIn testimony Whereof I affixmy signature.

NoRMAN nfrKLniNp. f 

